Patents by Inventor Fumitake Imaizumi

Fumitake Imaizumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing maleic anhydride adduct of high molecular weight 1,2-polybutadiene
    Patent number: 4082817
    Abstract: A process for producing a maleic anhydride adduct of high molecular weight 1,2-polybutadiene by contacting with heat maleic anhydride with high molecular weight 1,2-polybutadiene in the absence of a radical initiator in a halogenated aromatic hydrocarbon solvent. The adduct obtained by this process has a high molecular weight of more than 10,000 and is quite free from gel. Said process enables the addition of maleic anhydride in any desired proportion.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: April 4, 1978
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Fumitake Imaizumi, Isao Nagaoka, Mitsuo Kurokawa, Koei Komatsu
  • Photosensitive composition using maleic anhydride adduct of a 1,2 polybutadiene
    Patent number: 4023973
    Abstract: A photosensitive composition comprising (1) a maleic anhydride adduct of 1,2-polybutadiene having a molecular weight of 10,000 or higher, (2) at least one photosensitizer and/or at least one photosensitive crosslinking agent, and, if necessary, (3) at least one acrylic monomer. This composition can be developed with water or a polar solvent such as an alcohol, and its layer formed on a support provides a printing plate. When the acrylic monomer is contained, the composition is suitable for use in flexographic printing.
    Type: Grant
    Filed: April 17, 1975
    Date of Patent: May 17, 1977
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Fumitake Imaizumi, Isao Nagaoka, Mitsuo Kurokawa, Koei Komatsu, Yasuyuki Takimoto, Hidefumi Kusuda